GI.Gio.Objects.Socket

A Socket is a low-level networking primitive. It is a more or less direct mapping of the BSD socket API in a portable GObject based API. It supports both the UNIX socket implementations and winsock2 on Windows.

Socket is the platform independent base upon which the higher level network primitives are based. Applications are not typically meant to use it directly, but rather through classes like SocketClient, SocketService and SocketConnection. However there may be cases where direct use of Socket is useful.

Socket implements the Initable interface, so if it is manually constructed by e.g. g_object_new() you must call initableInit and check the results before using the object. This is done automatically in socketNew and socketNewFromFd, so these functions can return Nothing.

Sockets operate in two general modes, blocking or non-blocking. When in blocking mode all operations (which don’t take an explicit blocking parameter) block until the requested operation is finished or there is an error. In non-blocking mode all calls that would block return immediately with a IOErrorEnumWouldBlock error. To know when a call would successfully run you can call socketConditionCheck, or socketConditionWait. You can also use g_socket_create_source() and attach it to a MainContext to get callbacks when I/O is possible. Note that all sockets are always set to non blocking mode in the system, and blocking mode is emulated in GSocket.

When working in non-blocking mode applications should always be able to handle getting a IOErrorEnumWouldBlock error even when some other function said that I/O was possible. This can easily happen in case of a race condition in the application, but it can also happen for other reasons. For instance, on Windows a socket is always seen as writable until a write returns IOErrorEnumWouldBlock.

GSockets can be either connection oriented or datagram based. For connection oriented types you must first establish a connection by either connecting to an address or accepting a connection from another address. For connectionless socket types the target/source address is specified or received in each I/O operation.

All socket file descriptors are set to be close-on-exec.

Note that creating a Socket causes the signal SIGPIPE to be ignored for the remainder of the program. If you are writing a command-line utility that uses Socket, you may need to take into account the fact that your program will not automatically be killed if it tries to write to stdout after it has been closed.

Like most other APIs in GLib, Socket is not inherently thread safe. To use a Socket concurrently from multiple threads, you must implement your own locking.

Since: 2.22

Exported types

newtype Socket

Memory-managed wrapper type.

Constructors

Socket (ManagedPtr Socket)

Instances

GObject Socket

Defined in GI.Gio.Objects.Socket

Methods

gobjectType :: IO GType

HasParentTypes Socket

Defined in GI.Gio.Objects.Socket

type ParentTypes Socket

Defined in GI.Gio.Objects.Socket

type ParentTypes Socket = Object ': (DatagramBased ': (Initable ': ([] :: [Type])))

class (GObject o, IsDescendantOf Socket o) => IsSocket o

Type class for types which can be safely cast to Socket, for instance with toSocket.

Instances

(GObject o, IsDescendantOf Socket o) => IsSocket o

Defined in GI.Gio.Objects.Socket

toSocket :: (MonadIO m, IsSocket o) => o -> m Socket

Cast to Socket, for types for which this is known to be safe. For general casts, use castTo.

noSocket :: Maybe Socket

A convenience alias for Nothing :: Maybe Socket.

Methods

accept

socketAccept

Arguments

:: (HasCallStack, MonadIO m, IsSocket a, IsCancellable b)

=> a

socket: a Socket.

-> Maybe b

cancellable: a GCancellable or Nothing

-> m Socket

Returns: a new Socket, or Nothing on error. Free the returned object with objectUnref. (Can throw GError)

Accept incoming connections on a connection-based socket. This removes the first outstanding connection request from the listening socket and creates a Socket object for it.

The socket must be bound to a local address with socketBind and must be listening for incoming connections (socketListen).

If there are no outstanding connections then the operation will block or return IOErrorEnumWouldBlock if non-blocking I/O is enabled. To be notified of an incoming connection, wait for the IOConditionIn condition.

Since: 2.22

bind

socketBind

Arguments

:: (HasCallStack, MonadIO m, IsSocket a, IsSocketAddress b)

=> a

socket: a Socket.

-> b

address: a SocketAddress specifying the local address.

-> Bool

allowReuse: whether to allow reusing this address

-> m ()

(Can throw GError)

When a socket is created it is attached to an address family, but it doesn't have an address in this family. socketBind assigns the address (sometimes called name) of the socket.

It is generally required to bind to a local address before you can receive connections. (See socketListen and socketAccept ). In certain situations, you may also want to bind a socket that will be used to initiate connections, though this is not normally required.

If socket is a TCP socket, then allowReuse controls the setting of the SO_REUSEADDR socket option; normally it should be True for server sockets (sockets that you will eventually call socketAccept on), and False for client sockets. (Failing to set this flag on a server socket may cause socketBind to return IOErrorEnumAddressInUse if the server program is stopped and then immediately restarted.)

If socket is a UDP socket, then allowReuse determines whether or not other UDP sockets can be bound to the same address at the same time. In particular, you can have several UDP sockets bound to the same address, and they will all receive all of the multicast and broadcast packets sent to that address. (The behavior of unicast UDP packets to an address with multiple listeners is not defined.)

Since: 2.22

checkConnectResult

socketCheckConnectResult

Arguments

:: (HasCallStack, MonadIO m, IsSocket a)

=> a

socket: a Socket

-> m ()

(Can throw GError)

Checks and resets the pending connect error for the socket. This is used to check for errors when socketConnect is used in non-blocking mode.

Since: 2.22

close

socketClose

Arguments

:: (HasCallStack, MonadIO m, IsSocket a)

=> a

socket: a Socket

-> m ()

(Can throw GError)

Closes the socket, shutting down any active connection.

Closing a socket does not wait for all outstanding I/O operations to finish, so the caller should not rely on them to be guaranteed to complete even if the close returns with no error.

Once the socket is closed, all other operations will return IOErrorEnumClosed. Closing a socket multiple times will not return an error.

Sockets will be automatically closed when the last reference is dropped, but you might want to call this function to make sure resources are released as early as possible.

Beware that due to the way that TCP works, it is possible for recently-sent data to be lost if either you close a socket while the IOConditionIn condition is set, or else if the remote connection tries to send something to you after you close the socket but before it has finished reading all of the data you sent. There is no easy generic way to avoid this problem; the easiest fix is to design the network protocol such that the client will never send data "out of turn". Another solution is for the server to half-close the connection by calling socketShutdown with only the shutdownWrite flag set, and then wait for the client to notice this and close its side of the connection, after which the server can safely call socketClose. (This is what TcpConnection does if you call tcpConnectionSetGracefulDisconnect. But of course, this only works if the client will close its connection after the server does.)

Since: 2.22

conditionCheck

socketConditionCheck

Arguments

:: (HasCallStack, MonadIO m, IsSocket a)

=> a

socket: a Socket

-> [IOCondition]

condition: a IOCondition mask to check

-> m [IOCondition]

Returns: the gIOCondition mask of the current state

Checks on the readiness of socket to perform operations. The operations specified in condition are checked for and masked against the currently-satisfied conditions on socket. The result is returned.

Note that on Windows, it is possible for an operation to return IOErrorEnumWouldBlock even immediately after socketConditionCheck has claimed that the socket is ready for writing. Rather than calling socketConditionCheck and then writing to the socket if it succeeds, it is generally better to simply try writing to the socket right away, and try again later if the initial attempt returns IOErrorEnumWouldBlock.

It is meaningless to specify IOConditionErr or IOConditionHup in condition; these conditions will always be set in the output if they are true.

This call never blocks.

Since: 2.22

conditionTimedWait

socketConditionTimedWait

Arguments

:: (HasCallStack, MonadIO m, IsSocket a, IsCancellable b)

=> a

socket: a Socket

-> [IOCondition]

condition: a IOCondition mask to wait for

-> Int64

timeoutUs: the maximum time (in microseconds) to wait, or -1

-> Maybe b

cancellable: a Cancellable, or Nothing

-> m ()

(Can throw GError)

Waits for up to timeoutUs microseconds for condition to become true on socket. If the condition is met, True is returned.

If cancellable is cancelled before the condition is met, or if timeoutUs (or the socket's Socket:timeout) is reached before the condition is met, then False is returned and error, if non-Nothing, is set to the appropriate value (IOErrorEnumCancelled or IOErrorEnumTimedOut).

If you don't want a timeout, use socketConditionWait. (Alternatively, you can pass -1 for timeoutUs.)

Note that although timeoutUs is in microseconds for consistency with other GLib APIs, this function actually only has millisecond resolution, and the behavior is undefined if timeoutUs is not an exact number of milliseconds.

Since: 2.32

conditionWait

socketConditionWait

Arguments

:: (HasCallStack, MonadIO m, IsSocket a, IsCancellable b)

=> a

socket: a Socket

-> [IOCondition]

condition: a IOCondition mask to wait for

-> Maybe b

cancellable: a Cancellable, or Nothing

-> m ()

(Can throw GError)

Waits for condition to become true on socket. When the condition is met, True is returned.

If cancellable is cancelled before the condition is met, or if the socket has a timeout set and it is reached before the condition is met, then False is returned and error, if non-Nothing, is set to the appropriate value (IOErrorEnumCancelled or IOErrorEnumTimedOut).

See also socketConditionTimedWait.

Since: 2.22

connect

socketConnect

Arguments

:: (HasCallStack, MonadIO m, IsSocket a, IsSocketAddress b, IsCancellable c)

=> a

socket: a Socket.

-> b

address: a SocketAddress specifying the remote address.

-> Maybe c

cancellable: a GCancellable or Nothing

-> m ()

(Can throw GError)

Connect the socket to the specified remote address.

For connection oriented socket this generally means we attempt to make a connection to the address. For a connection-less socket it sets the default address for socketSend and discards all incoming datagrams from other sources.

Generally connection oriented sockets can only connect once, but connection-less sockets can connect multiple times to change the default address.

If the connect call needs to do network I/O it will block, unless non-blocking I/O is enabled. Then IOErrorEnumPending is returned and the user can be notified of the connection finishing by waiting for the G_IO_OUT condition. The result of the connection must then be checked with socketCheckConnectResult.

Since: 2.22

connectionFactoryCreateConnection

socketConnectionFactoryCreateConnection

Arguments

:: (HasCallStack, MonadIO m, IsSocket a)

=> a

socket: a Socket

-> m SocketConnection

Returns: a SocketConnection

Creates a SocketConnection subclass of the right type for socket.

Since: 2.22

getAvailableBytes

socketGetAvailableBytes

Arguments

:: (HasCallStack, MonadIO m, IsSocket a)

=> a

socket: a Socket

-> m Int64

Returns: the number of bytes that can be read from the socket without blocking or truncating, or -1 on error.

Get the amount of data pending in the OS input buffer, without blocking.

If socket is a UDP or SCTP socket, this will return the size of just the next packet, even if additional packets are buffered after that one.

Note that on Windows, this function is rather inefficient in the UDP case, and so if you know any plausible upper bound on the size of the incoming packet, it is better to just do a socketReceive with a buffer of that size, rather than calling socketGetAvailableBytes first and then doing a receive of exactly the right size.

Since: 2.32

getBlocking

socketGetBlocking

Arguments

:: (HasCallStack, MonadIO m, IsSocket a)

=> a

socket: a Socket.

-> m Bool

Returns: True if blocking I/O is used, False otherwise.

Gets the blocking mode of the socket. For details on blocking I/O, see socketSetBlocking.

Since: 2.22

getBroadcast

socketGetBroadcast

Arguments

:: (HasCallStack, MonadIO m, IsSocket a)

=> a

socket: a Socket.

-> m Bool

Returns: the broadcast setting on socket

Gets the broadcast setting on socket; if True, it is possible to send packets to broadcast addresses.

Since: 2.32

getCredentials

socketGetCredentials

Arguments

:: (HasCallStack, MonadIO m, IsSocket a)

=> a

socket: a Socket.

-> m Credentials

Returns: Nothing if error is set, otherwise a Credentials object that must be freed with objectUnref. (Can throw GError)

Returns the credentials of the foreign process connected to this socket, if any (e.g. it is only supported for SocketFamilyUnix sockets).

If this operation isn't supported on the OS, the method fails with the IOErrorEnumNotSupported error. On Linux this is implemented by reading the SO_PEERCRED option on the underlying socket.

Other ways to obtain credentials from a foreign peer includes the UnixCredentialsMessage type and unixConnectionSendCredentials / unixConnectionReceiveCredentials functions.

Since: 2.26

getFamily

socketGetFamily

Arguments

:: (HasCallStack, MonadIO m, IsSocket a)

=> a

socket: a Socket.

-> m SocketFamily

Returns: a SocketFamily

Gets the socket family of the socket.

Since: 2.22

getFd

socketGetFd

Arguments

:: (HasCallStack, MonadIO m, IsSocket a)

=> a

socket: a Socket.

-> m Int32

Returns: the file descriptor of the socket.

Returns the underlying OS socket object. On unix this is a socket file descriptor, and on Windows this is a Winsock2 SOCKET handle. This may be useful for doing platform specific or otherwise unusual operations on the socket.

Since: 2.22

getKeepalive

socketGetKeepalive

Arguments

:: (HasCallStack, MonadIO m, IsSocket a)

=> a

socket: a Socket.

-> m Bool

Returns: True if keepalive is active, False otherwise.

Gets the keepalive mode of the socket. For details on this, see socketSetKeepalive.

Since: 2.22

getListenBacklog

socketGetListenBacklog

Arguments

:: (HasCallStack, MonadIO m, IsSocket a)

=> a

socket: a Socket.

-> m Int32

Returns: the maximum number of pending connections.

Gets the listen backlog setting of the socket. For details on this, see socketSetListenBacklog.

Since: 2.22

getLocalAddress

socketGetLocalAddress

Arguments

:: (HasCallStack, MonadIO m, IsSocket a)

=> a

socket: a Socket.

-> m SocketAddress

Returns: a SocketAddress or Nothing on error. Free the returned object with objectUnref. (Can throw GError)

Try to get the local address of a bound socket. This is only useful if the socket has been bound to a local address, either explicitly or implicitly when connecting.

Since: 2.22

getMulticastLoopback

socketGetMulticastLoopback

Arguments

:: (HasCallStack, MonadIO m, IsSocket a)

=> a

socket: a Socket.

-> m Bool

Returns: the multicast loopback setting on socket

Gets the multicast loopback setting on socket; if True (the default), outgoing multicast packets will be looped back to multicast listeners on the same host.

Since: 2.32

getMulticastTtl

socketGetMulticastTtl

Arguments

:: (HasCallStack, MonadIO m, IsSocket a)

=> a

socket: a Socket.

-> m Word32

Returns: the multicast time-to-live setting on socket

Gets the multicast time-to-live setting on socket; see socketSetMulticastTtl for more details.

Since: 2.32

getOption

socketGetOption

Arguments

:: (HasCallStack, MonadIO m, IsSocket a)

=> a

socket: a Socket

-> Int32

level: the "API level" of the option (eg, SOL_SOCKET)

-> Int32

optname: the "name" of the option (eg, SO_BROADCAST)

-> m Int32

(Can throw GError)

Gets the value of an integer-valued option on socket, as with getsockopt(). (If you need to fetch a non-integer-valued option, you will need to call getsockopt() directly.)

The [<gio/gnetworking.h>][gio-gnetworking.h] header pulls in system headers that will define most of the standard/portable socket options. For unusual socket protocols or platform-dependent options, you may need to include additional headers.

Note that even for socket options that are a single byte in size, value is still a pointer to a gint variable, not a guchar; socketGetOption will handle the conversion internally.

Since: 2.36

getProtocol

socketGetProtocol

Arguments

:: (HasCallStack, MonadIO m, IsSocket a)

=> a

socket: a Socket.

-> m SocketProtocol

Returns: a protocol id, or -1 if unknown

Gets the socket protocol id the socket was created with. In case the protocol is unknown, -1 is returned.

Since: 2.22

getRemoteAddress

socketGetRemoteAddress

Arguments

:: (HasCallStack, MonadIO m, IsSocket a)

=> a

socket: a Socket.

-> m SocketAddress

Returns: a SocketAddress or Nothing on error. Free the returned object with objectUnref. (Can throw GError)

Try to get the remote address of a connected socket. This is only useful for connection oriented sockets that have been connected.

Since: 2.22

getSocketType

socketGetSocketType

Arguments

:: (HasCallStack, MonadIO m, IsSocket a)

=> a

socket: a Socket.

-> m SocketType

Returns: a SocketType

Gets the socket type of the socket.

Since: 2.22

getTimeout

socketGetTimeout

Arguments

:: (HasCallStack, MonadIO m, IsSocket a)

=> a

socket: a Socket.

-> m Word32

Returns: the timeout in seconds

Gets the timeout setting of the socket. For details on this, see socketSetTimeout.

Since: 2.26

getTtl

socketGetTtl

Arguments

:: (HasCallStack, MonadIO m, IsSocket a)

=> a

socket: a Socket.

-> m Word32

Returns: the time-to-live setting on socket

Gets the unicast time-to-live setting on socket; see socketSetTtl for more details.

Since: 2.32

isClosed

socketIsClosed

Arguments

:: (HasCallStack, MonadIO m, IsSocket a)

=> a

socket: a Socket

-> m Bool

Returns: True if socket is closed, False otherwise

Checks whether a socket is closed.

Since: 2.22

isConnected

socketIsConnected

Arguments

:: (HasCallStack, MonadIO m, IsSocket a)

=> a

socket: a Socket.

-> m Bool

Returns: True if socket is connected, False otherwise.

Check whether the socket is connected. This is only useful for connection-oriented sockets.

If using socketShutdown, this function will return True until the socket has been shut down for reading and writing. If you do a non-blocking connect, this function will not return True until after you call socketCheckConnectResult.

Since: 2.22

joinMulticastGroup

socketJoinMulticastGroup

Arguments

:: (HasCallStack, MonadIO m, IsSocket a, IsInetAddress b)

=> a

socket: a Socket.

-> b

group: a InetAddress specifying the group address to join.

-> Bool

sourceSpecific: True if source-specific multicast should be used

-> Maybe Text

iface: Name of the interface to use, or Nothing

-> m ()

(Can throw GError)

Registers socket to receive multicast messages sent to group. socket must be a SocketTypeDatagram socket, and must have been bound to an appropriate interface and port with socketBind.

If iface is Nothing, the system will automatically pick an interface to bind to based on group.

If sourceSpecific is True, source-specific multicast as defined in RFC 4604 is used. Note that on older platforms this may fail with a IOErrorEnumNotSupported error.

To bind to a given source-specific multicast address, use socketJoinMulticastGroupSsm instead.

Since: 2.32

joinMulticastGroupSsm

socketJoinMulticastGroupSsm

Arguments

:: (HasCallStack, MonadIO m, IsSocket a, IsInetAddress b, IsInetAddress c)

=> a

socket: a Socket.

-> b

group: a InetAddress specifying the group address to join.

-> Maybe c

sourceSpecific: a InetAddress specifying the source-specific multicast address or Nothing to ignore.

-> Maybe Text

iface: Name of the interface to use, or Nothing

-> m ()

(Can throw GError)

Registers socket to receive multicast messages sent to group. socket must be a SocketTypeDatagram socket, and must have been bound to an appropriate interface and port with socketBind.

If iface is Nothing, the system will automatically pick an interface to bind to based on group.

If sourceSpecific is not Nothing, use source-specific multicast as defined in RFC 4604. Note that on older platforms this may fail with a IOErrorEnumNotSupported error.

Note that this function can be called multiple times for the same group with different sourceSpecific in order to receive multicast packets from more than one source.

Since: 2.56

leaveMulticastGroup

socketLeaveMulticastGroup

Arguments

:: (HasCallStack, MonadIO m, IsSocket a, IsInetAddress b)

=> a

socket: a Socket.

-> b

group: a InetAddress specifying the group address to leave.

-> Bool

sourceSpecific: True if source-specific multicast was used

-> Maybe Text

iface: Interface used

-> m ()

(Can throw GError)

Removes socket from the multicast group defined by group, iface, and sourceSpecific (which must all have the same values they had when you joined the group).

socket remains bound to its address and port, and can still receive unicast messages after calling this.

To unbind to a given source-specific multicast address, use socketLeaveMulticastGroupSsm instead.

Since: 2.32

leaveMulticastGroupSsm

socketLeaveMulticastGroupSsm

Arguments

:: (HasCallStack, MonadIO m, IsSocket a, IsInetAddress b, IsInetAddress c)

=> a

socket: a Socket.

-> b

group: a InetAddress specifying the group address to leave.

-> Maybe c

sourceSpecific: a InetAddress specifying the source-specific multicast address or Nothing to ignore.

-> Maybe Text

iface: Name of the interface to use, or Nothing

-> m ()

(Can throw GError)

Removes socket from the multicast group defined by group, iface, and sourceSpecific (which must all have the same values they had when you joined the group).

socket remains bound to its address and port, and can still receive unicast messages after calling this.

Since: 2.56

listen

socketListen

Arguments

:: (HasCallStack, MonadIO m, IsSocket a)

=> a

socket: a Socket.

-> m ()

(Can throw GError)

Marks the socket as a server socket, i.e. a socket that is used to accept incoming requests using socketAccept.

Before calling this the socket must be bound to a local address using socketBind.

To set the maximum amount of outstanding clients, use socketSetListenBacklog.

Since: 2.22

new

socketNew

Arguments

:: (HasCallStack, MonadIO m)

=> SocketFamily

family: the socket family to use, e.g. SocketFamilyIpv4.

-> SocketType

type: the socket type to use.

-> SocketProtocol

protocol: the id of the protocol to use, or 0 for default.

-> m Socket

Returns: a Socket or Nothing on error. Free the returned object with objectUnref. (Can throw GError)

Creates a new Socket with the defined family, type and protocol. If protocol is 0 (SocketProtocolDefault) the default protocol type for the family and type is used.

The protocol is a family and type specific int that specifies what kind of protocol to use. SocketProtocol lists several common ones. Many families only support one protocol, and use 0 for this, others support several and using 0 means to use the default protocol for the family and type.

The protocol id is passed directly to the operating system, so you can use protocols not listed in SocketProtocol if you know the protocol number used for it.

Since: 2.22

newFromFd

socketNewFromFd

Arguments

:: (HasCallStack, MonadIO m)

=> Int32

fd: a native socket file descriptor.

-> m Socket

Returns: a Socket or Nothing on error. Free the returned object with objectUnref. (Can throw GError)

Creates a new Socket from a native file descriptor or winsock SOCKET handle.

This reads all the settings from the file descriptor so that all properties should work. Note that the file descriptor will be set to non-blocking mode, independent on the blocking mode of the Socket.

On success, the returned Socket takes ownership of fd. On failure, the caller must close fd themselves.

Since GLib 2.46, it is no longer a fatal error to call this on a non-socket descriptor. Instead, a GError will be set with code IOErrorEnumFailed

Since: 2.22

receive

socketReceive

Arguments

:: (HasCallStack, MonadIO m, IsSocket a, IsCancellable b)

=> a

socket: a Socket

-> ByteString

buffer: a buffer to read data into (which should be at least size bytes long).

-> Maybe b

cancellable: a GCancellable or Nothing

-> m Int64

Returns: Number of bytes read, or 0 if the connection was closed by the peer, or -1 on error (Can throw GError)

Receive data (up to size bytes) from a socket. This is mainly used by connection-oriented sockets; it is identical to socketReceiveFrom with address set to Nothing.

For SocketTypeDatagram and SocketTypeSeqpacket sockets, socketReceive will always read either 0 or 1 complete messages from the socket. If the received message is too large to fit in buffer, then the data beyond size bytes will be discarded, without any explicit indication that this has occurred.

For SocketTypeStream sockets, socketReceive can return any number of bytes, up to size. If more than size bytes have been received, the additional data will be returned in future calls to socketReceive.

If the socket is in blocking mode the call will block until there is some data to receive, the connection is closed, or there is an error. If there is no data available and the socket is in non-blocking mode, a IOErrorEnumWouldBlock error will be returned. To be notified when data is available, wait for the IOConditionIn condition.

On error -1 is returned and error is set accordingly.

Since: 2.22

receiveFrom

socketReceiveFrom

Arguments

:: (HasCallStack, MonadIO m, IsSocket a, IsCancellable b)

=> a

socket: a Socket

-> ByteString

buffer: a buffer to read data into (which should be at least size bytes long).

-> Maybe b

cancellable: a GCancellable or Nothing

-> m (Int64, SocketAddress)

Returns: Number of bytes read, or 0 if the connection was closed by the peer, or -1 on error (Can throw GError)

Receive data (up to size bytes) from a socket.

If address is non-Nothing then address will be set equal to the source address of the received packet. address is owned by the caller.

See socketReceive for additional information.

Since: 2.22

receiveMessage

socketReceiveMessage

Arguments

:: (HasCallStack, MonadIO m, IsSocket a, IsCancellable b)

=> a

socket: a Socket

-> [InputVector]

vectors: an array of InputVector structs

-> Int32

flags: a pointer to an int containing SocketMsgFlags flags

-> Maybe b

cancellable: a GCancellable or Nothing

-> m (Int64, Maybe SocketAddress, Maybe [SocketControlMessage], Int32)

Returns: Number of bytes read, or 0 if the connection was closed by the peer, or -1 on error (Can throw GError)

Receive data from a socket. For receiving multiple messages, see socketReceiveMessages; for easier use, see socketReceive and socketReceiveFrom.

If address is non-Nothing then address will be set equal to the source address of the received packet. address is owned by the caller.

vector must point to an array of InputVector structs and numVectors must be the length of this array. These structs describe the buffers that received data will be scattered into. If numVectors is -1, then vectors is assumed to be terminated by a InputVector with a Nothing buffer pointer.

As a special case, if numVectors is 0 (in which case, vectors may of course be Nothing), then a single byte is received and discarded. This is to facilitate the common practice of sending a single '\0' byte for the purposes of transferring ancillary data.

messages, if non-Nothing, will be set to point to a newly-allocated array of SocketControlMessage instances or Nothing if no such messages was received. These correspond to the control messages received from the kernel, one SocketControlMessage per message from the kernel. This array is Nothing-terminated and must be freed by the caller using free after calling objectUnref on each element. If messages is Nothing, any control messages received will be discarded.

numMessages, if non-Nothing, will be set to the number of control messages received.

If both messages and numMessages are non-Nothing, then numMessages gives the number of SocketControlMessage instances in messages (ie: not including the Nothing terminator).

flags is an in/out parameter. The commonly available arguments for this are available in the SocketMsgFlags enum, but the values there are the same as the system values, and the flags are passed in as-is, so you can pass in system-specific flags too (and socketReceiveMessage may pass system-specific flags out). Flags passed in to the parameter affect the receive operation; flags returned out of it are relevant to the specific returned message.

As with socketReceive, data may be discarded if socket is SocketTypeDatagram or SocketTypeSeqpacket and you do not provide enough buffer space to read a complete message. You can pass SocketMsgFlagsPeek in flags to peek at the current message without removing it from the receive queue, but there is no portable way to find out the length of the message other than by reading it into a sufficiently-large buffer.

If the socket is in blocking mode the call will block until there is some data to receive, the connection is closed, or there is an error. If there is no data available and the socket is in non-blocking mode, a IOErrorEnumWouldBlock error will be returned. To be notified when data is available, wait for the IOConditionIn condition.

On error -1 is returned and error is set accordingly.

Since: 2.22

receiveMessages

socketReceiveMessages

Arguments

:: (HasCallStack, MonadIO m, IsSocket a, IsCancellable b)

=> a

socket: a Socket

-> [InputMessage]

messages: an array of InputMessage structs

-> Int32

flags: an int containing SocketMsgFlags flags for the overall operation

-> Maybe b

cancellable: a GCancellable or Nothing

-> m Int32

Returns: number of messages received, or -1 on error. Note that the number of messages received may be smaller than numMessages if in non-blocking mode, if the peer closed the connection, or if numMessages was larger than UIO_MAXIOV (1024), in which case the caller may re-try to receive the remaining messages. (Can throw GError)

Receive multiple data messages from socket in one go. This is the most complicated and fully-featured version of this call. For easier use, see socketReceive, socketReceiveFrom, and socketReceiveMessage.

messages must point to an array of InputMessage structs and numMessages must be the length of this array. Each InputMessage contains a pointer to an array of InputVector structs describing the buffers that the data received in each message will be written to. Using multiple GInputVectors is more memory-efficient than manually copying data out of a single buffer to multiple sources, and more system-call-efficient than making multiple calls to socketReceive, such as in scenarios where a lot of data packets need to be received (e.g. high-bandwidth video streaming over RTP/UDP).

flags modify how all messages are received. The commonly available arguments for this are available in the SocketMsgFlags enum, but the values there are the same as the system values, and the flags are passed in as-is, so you can pass in system-specific flags too. These flags affect the overall receive operation. Flags affecting individual messages are returned in InputMessage.flags.

The other members of InputMessage are treated as described in its documentation.

If Socket:blocking is True the call will block until numMessages have been received, or the end of the stream is reached.

If Socket:blocking is False the call will return up to numMessages without blocking, or IOErrorEnumWouldBlock if no messages are queued in the operating system to be received.

In blocking mode, if Socket:timeout is positive and is reached before any messages are received, IOErrorEnumTimedOut is returned, otherwise up to numMessages are returned. (Note: This is effectively the behaviour of MSG_WAITFORONE with recvmmsg().)

To be notified when messages are available, wait for the IOConditionIn condition. Note though that you may still receive IOErrorEnumWouldBlock from socketReceiveMessages even if you were previously notified of a IOConditionIn condition.

If the remote peer closes the connection, any messages queued in the operating system will be returned, and subsequent calls to socketReceiveMessages will return 0 (with no error set).

On error -1 is returned and error is set accordingly. An error will only be returned if zero messages could be received; otherwise the number of messages successfully received before the error will be returned.

Since: 2.48

receiveWithBlocking

socketReceiveWithBlocking

Arguments

:: (HasCallStack, MonadIO m, IsSocket a, IsCancellable b)

=> a

socket: a Socket

-> ByteString

buffer: a buffer to read data into (which should be at least size bytes long).

-> Bool

blocking: whether to do blocking or non-blocking I/O

-> Maybe b

cancellable: a GCancellable or Nothing

-> m Int64

Returns: Number of bytes read, or 0 if the connection was closed by the peer, or -1 on error (Can throw GError)

This behaves exactly the same as socketReceive, except that the choice of blocking or non-blocking behavior is determined by the blocking argument rather than by socket's properties.

Since: 2.26

send

socketSend

Arguments

:: (HasCallStack, MonadIO m, IsSocket a, IsCancellable b)

=> a

socket: a Socket

-> ByteString

buffer: the buffer containing the data to send.

-> Maybe b

cancellable: a GCancellable or Nothing

-> m Int64

Returns: Number of bytes written (which may be less than size), or -1 on error (Can throw GError)

Tries to send size bytes from buffer on the socket. This is mainly used by connection-oriented sockets; it is identical to socketSendTo with address set to Nothing.

If the socket is in blocking mode the call will block until there is space for the data in the socket queue. If there is no space available and the socket is in non-blocking mode a IOErrorEnumWouldBlock error will be returned. To be notified when space is available, wait for the IOConditionOut condition. Note though that you may still receive IOErrorEnumWouldBlock from socketSend even if you were previously notified of a IOConditionOut condition. (On Windows in particular, this is very common due to the way the underlying APIs work.)

On error -1 is returned and error is set accordingly.

Since: 2.22

sendMessage

socketSendMessage

Arguments

:: (HasCallStack, MonadIO m, IsSocket a, IsSocketAddress b, IsCancellable c)

=> a

socket: a Socket

-> Maybe b

address: a SocketAddress, or Nothing

-> [OutputVector]

vectors: an array of OutputVector structs

-> Maybe [SocketControlMessage]

messages: a pointer to an array of GSocketControlMessages, or Nothing.

-> Int32

flags: an int containing SocketMsgFlags flags

-> Maybe c

cancellable: a GCancellable or Nothing

-> m Int64

Returns: Number of bytes written (which may be less than size), or -1 on error (Can throw GError)

Send data to address on socket. For sending multiple messages see socketSendMessages; for easier use, see socketSend and socketSendTo.

If address is Nothing then the message is sent to the default receiver (set by socketConnect).

vectors must point to an array of OutputVector structs and numVectors must be the length of this array. (If numVectors is -1, then vectors is assumed to be terminated by a OutputVector with a Nothing buffer pointer.) The OutputVector structs describe the buffers that the sent data will be gathered from. Using multiple GOutputVectors is more memory-efficient than manually copying data from multiple sources into a single buffer, and more network-efficient than making multiple calls to socketSend.

messages, if non-Nothing, is taken to point to an array of numMessages SocketControlMessage instances. These correspond to the control messages to be sent on the socket. If numMessages is -1 then messages is treated as a Nothing-terminated array.

flags modify how the message is sent. The commonly available arguments for this are available in the SocketMsgFlags enum, but the values there are the same as the system values, and the flags are passed in as-is, so you can pass in system-specific flags too.

If the socket is in blocking mode the call will block until there is space for the data in the socket queue. If there is no space available and the socket is in non-blocking mode a IOErrorEnumWouldBlock error will be returned. To be notified when space is available, wait for the IOConditionOut condition. Note though that you may still receive IOErrorEnumWouldBlock from socketSend even if you were previously notified of a IOConditionOut condition. (On Windows in particular, this is very common due to the way the underlying APIs work.)

On error -1 is returned and error is set accordingly.

Since: 2.22

sendMessageWithTimeout

socketSendMessageWithTimeout

Arguments

:: (HasCallStack, MonadIO m, IsSocket a, IsSocketAddress b, IsCancellable c)

=> a

socket: a Socket

-> Maybe b

address: a SocketAddress, or Nothing

-> [OutputVector]

vectors: an array of OutputVector structs

-> Maybe [SocketControlMessage]

messages: a pointer to an array of GSocketControlMessages, or Nothing.

-> Int32

flags: an int containing SocketMsgFlags flags

-> Int64

timeoutUs: the maximum time (in microseconds) to wait, or -1

-> Maybe c

cancellable: a GCancellable or Nothing

-> m (PollableReturn, Word64)

Returns: PollableReturnOk if all data was successfully written, PollableReturnWouldBlock if the socket is currently not writable, or PollableReturnFailed if an error happened and error is set. (Can throw GError)

This behaves exactly the same as socketSendMessage, except that the choice of timeout behavior is determined by the timeoutUs argument rather than by socket's properties.

On error PollableReturnFailed is returned and error is set accordingly, or if the socket is currently not writable PollableReturnWouldBlock is returned. bytesWritten will contain 0 in both cases.

Since: 2.60

sendMessages

socketSendMessages

Arguments

:: (HasCallStack, MonadIO m, IsSocket a, IsCancellable b)

=> a

socket: a Socket

-> [OutputMessage]

messages: an array of OutputMessage structs

-> Int32

flags: an int containing SocketMsgFlags flags

-> Maybe b

cancellable: a GCancellable or Nothing

-> m Int32

Returns: number of messages sent, or -1 on error. Note that the number of messages sent may be smaller than numMessages if the socket is non-blocking or if numMessages was larger than UIO_MAXIOV (1024), in which case the caller may re-try to send the remaining messages. (Can throw GError)

Send multiple data messages from socket in one go. This is the most complicated and fully-featured version of this call. For easier use, see socketSend, socketSendTo, and socketSendMessage.

messages must point to an array of OutputMessage structs and numMessages must be the length of this array. Each OutputMessage contains an address to send the data to, and a pointer to an array of OutputVector structs to describe the buffers that the data to be sent for each message will be gathered from. Using multiple GOutputVectors is more memory-efficient than manually copying data from multiple sources into a single buffer, and more network-efficient than making multiple calls to socketSend. Sending multiple messages in one go avoids the overhead of making a lot of syscalls in scenarios where a lot of data packets need to be sent (e.g. high-bandwidth video streaming over RTP/UDP), or where the same data needs to be sent to multiple recipients.

flags modify how the message is sent. The commonly available arguments for this are available in the SocketMsgFlags enum, but the values there are the same as the system values, and the flags are passed in as-is, so you can pass in system-specific flags too.

If the socket is in blocking mode the call will block until there is space for all the data in the socket queue. If there is no space available and the socket is in non-blocking mode a IOErrorEnumWouldBlock error will be returned if no data was written at all, otherwise the number of messages sent will be returned. To be notified when space is available, wait for the IOConditionOut condition. Note though that you may still receive IOErrorEnumWouldBlock from socketSend even if you were previously notified of a IOConditionOut condition. (On Windows in particular, this is very common due to the way the underlying APIs work.)

On error -1 is returned and error is set accordingly. An error will only be returned if zero messages could be sent; otherwise the number of messages successfully sent before the error will be returned.

Since: 2.44

sendTo

socketSendTo

Arguments

:: (HasCallStack, MonadIO m, IsSocket a, IsSocketAddress b, IsCancellable c)

=> a

socket: a Socket

-> Maybe b

address: a SocketAddress, or Nothing

-> ByteString

buffer: the buffer containing the data to send.

-> Maybe c

cancellable: a GCancellable or Nothing

-> m Int64

Returns: Number of bytes written (which may be less than size), or -1 on error (Can throw GError)

Tries to send size bytes from buffer to address. If address is Nothing then the message is sent to the default receiver (set by socketConnect).

See socketSend for additional information.

Since: 2.22

sendWithBlocking

socketSendWithBlocking

Arguments

:: (HasCallStack, MonadIO m, IsSocket a, IsCancellable b)

=> a

socket: a Socket

-> ByteString

buffer: the buffer containing the data to send.

-> Bool

blocking: whether to do blocking or non-blocking I/O

-> Maybe b

cancellable: a GCancellable or Nothing

-> m Int64

Returns: Number of bytes written (which may be less than size), or -1 on error (Can throw GError)

This behaves exactly the same as socketSend, except that the choice of blocking or non-blocking behavior is determined by the blocking argument rather than by socket's properties.

Since: 2.26

setBlocking

socketSetBlocking

Arguments

:: (HasCallStack, MonadIO m, IsSocket a)

=> a

socket: a Socket.

-> Bool

blocking: Whether to use blocking I/O or not.

-> m ()

Sets the blocking mode of the socket. In blocking mode all operations (which don’t take an explicit blocking parameter) block until they succeed or there is an error. In non-blocking mode all functions return results immediately or with a IOErrorEnumWouldBlock error.

All sockets are created in blocking mode. However, note that the platform level socket is always non-blocking, and blocking mode is a GSocket level feature.

Since: 2.22

setBroadcast

socketSetBroadcast

Arguments

:: (HasCallStack, MonadIO m, IsSocket a)

=> a

socket: a Socket.

-> Bool

broadcast: whether socket should allow sending to broadcast addresses

-> m ()

Sets whether socket should allow sending to broadcast addresses. This is False by default.

Since: 2.32

setKeepalive

socketSetKeepalive

Arguments

:: (HasCallStack, MonadIO m, IsSocket a)

=> a

socket: a Socket.

-> Bool

keepalive: Value for the keepalive flag

-> m ()

Sets or unsets the SO_KEEPALIVE flag on the underlying socket. When this flag is set on a socket, the system will attempt to verify that the remote socket endpoint is still present if a sufficiently long period of time passes with no data being exchanged. If the system is unable to verify the presence of the remote endpoint, it will automatically close the connection.

This option is only functional on certain kinds of sockets. (Notably, SocketProtocolTcp sockets.)

The exact time between pings is system- and protocol-dependent, but will normally be at least two hours. Most commonly, you would set this flag on a server socket if you want to allow clients to remain idle for long periods of time, but also want to ensure that connections are eventually garbage-collected if clients crash or become unreachable.

Since: 2.22

setListenBacklog

socketSetListenBacklog

Arguments

:: (HasCallStack, MonadIO m, IsSocket a)

=> a

socket: a Socket.

-> Int32

backlog: the maximum number of pending connections.

-> m ()

Sets the maximum number of outstanding connections allowed when listening on this socket. If more clients than this are connecting to the socket and the application is not handling them on time then the new connections will be refused.

Note that this must be called before socketListen and has no effect if called after that.

Since: 2.22

setMulticastLoopback

socketSetMulticastLoopback

Arguments

:: (HasCallStack, MonadIO m, IsSocket a)

=> a

socket: a Socket.

-> Bool

loopback: whether socket should receive messages sent to its multicast groups from the local host

-> m ()

Sets whether outgoing multicast packets will be received by sockets listening on that multicast address on the same host. This is True by default.

Since: 2.32

setMulticastTtl

socketSetMulticastTtl

Arguments

:: (HasCallStack, MonadIO m, IsSocket a)

=> a

socket: a Socket.

-> Word32

ttl: the time-to-live value for all multicast datagrams on socket

-> m ()

Sets the time-to-live for outgoing multicast datagrams on socket. By default, this is 1, meaning that multicast packets will not leave the local network.

Since: 2.32

setOption

socketSetOption

Arguments

:: (HasCallStack, MonadIO m, IsSocket a)

=> a

socket: a Socket

-> Int32

level: the "API level" of the option (eg, SOL_SOCKET)

-> Int32

optname: the "name" of the option (eg, SO_BROADCAST)

-> Int32

value: the value to set the option to

-> m ()

(Can throw GError)

Sets the value of an integer-valued option on socket, as with setsockopt(). (If you need to set a non-integer-valued option, you will need to call setsockopt() directly.)

The [<gio/gnetworking.h>][gio-gnetworking.h] header pulls in system headers that will define most of the standard/portable socket options. For unusual socket protocols or platform-dependent options, you may need to include additional headers.

Since: 2.36

setTimeout

socketSetTimeout

Arguments

:: (HasCallStack, MonadIO m, IsSocket a)

=> a

socket: a Socket.

-> Word32

timeout: the timeout for socket, in seconds, or 0 for none

-> m ()

Sets the time in seconds after which I/O operations on socket will time out if they have not yet completed.

On a blocking socket, this means that any blocking Socket operation will time out after timeout seconds of inactivity, returning IOErrorEnumTimedOut.

On a non-blocking socket, calls to socketConditionWait will also fail with IOErrorEnumTimedOut after the given time. Sources created with g_socket_create_source() will trigger after timeout seconds of inactivity, with the requested condition set, at which point calling socketReceive, socketSend, socketCheckConnectResult, etc, will fail with IOErrorEnumTimedOut.

If timeout is 0 (the default), operations will never time out on their own.

Note that if an I/O operation is interrupted by a signal, this may cause the timeout to be reset.

Since: 2.26

setTtl

socketSetTtl

Arguments

:: (HasCallStack, MonadIO m, IsSocket a)

=> a

socket: a Socket.

-> Word32

ttl: the time-to-live value for all unicast packets on socket

-> m ()

Sets the time-to-live for outgoing unicast packets on socket. By default the platform-specific default value is used.

Since: 2.32

shutdown

socketShutdown

Arguments

:: (HasCallStack, MonadIO m, IsSocket a)

=> a

socket: a Socket

-> Bool

shutdownRead: whether to shut down the read side

-> Bool

shutdownWrite: whether to shut down the write side

-> m ()

(Can throw GError)

Shut down part or all of a full-duplex connection.

If shutdownRead is True then the receiving side of the connection is shut down, and further reading is disallowed.

If shutdownWrite is True then the sending side of the connection is shut down, and further writing is disallowed.

It is allowed for both shutdownRead and shutdownWrite to be True.

One example where it is useful to shut down only one side of a connection is graceful disconnect for TCP connections where you close the sending side, then wait for the other side to close the connection, thus ensuring that the other side saw all sent data.

Since: 2.22

speaksIpv4

socketSpeaksIpv4

Arguments

:: (HasCallStack, MonadIO m, IsSocket a)

=> a

socket: a Socket

-> m Bool

Returns: True if this socket can be used with IPv4.

Checks if a socket is capable of speaking IPv4.

IPv4 sockets are capable of speaking IPv4. On some operating systems and under some combinations of circumstances IPv6 sockets are also capable of speaking IPv4. See RFC 3493 section 3.7 for more information.

No other types of sockets are currently considered as being capable of speaking IPv4.

Since: 2.22

Properties

blocking

No description available in the introspection data.

constructSocketBlocking :: IsSocket o => Bool -> IO (GValueConstruct o)

Construct a GValueConstruct with valid value for the “blocking” property. This is rarely needed directly, but it is used by new.

getSocketBlocking :: (MonadIO m, IsSocket o) => o -> m Bool

Get the value of the “blocking” property. When overloading is enabled, this is equivalent to

get socket #blocking

setSocketBlocking :: (MonadIO m, IsSocket o) => o -> Bool -> m ()

Set the value of the “blocking” property. When overloading is enabled, this is equivalent to

set socket [ #blocking := value ]

broadcast

Whether the socket should allow sending to broadcast addresses.

Since: 2.32

constructSocketBroadcast :: IsSocket o => Bool -> IO (GValueConstruct o)

Construct a GValueConstruct with valid value for the “broadcast” property. This is rarely needed directly, but it is used by new.

getSocketBroadcast :: (MonadIO m, IsSocket o) => o -> m Bool

Get the value of the “broadcast” property. When overloading is enabled, this is equivalent to

get socket #broadcast

setSocketBroadcast :: (MonadIO m, IsSocket o) => o -> Bool -> m ()

Set the value of the “broadcast” property. When overloading is enabled, this is equivalent to

set socket [ #broadcast := value ]

family

No description available in the introspection data.

constructSocketFamily :: IsSocket o => SocketFamily -> IO (GValueConstruct o)

Construct a GValueConstruct with valid value for the “family” property. This is rarely needed directly, but it is used by new.

getSocketFamily :: (MonadIO m, IsSocket o) => o -> m SocketFamily

Get the value of the “family” property. When overloading is enabled, this is equivalent to

get socket #family

fd

No description available in the introspection data.

constructSocketFd :: IsSocket o => Int32 -> IO (GValueConstruct o)

Construct a GValueConstruct with valid value for the “fd” property. This is rarely needed directly, but it is used by new.

getSocketFd :: (MonadIO m, IsSocket o) => o -> m Int32

Get the value of the “fd” property. When overloading is enabled, this is equivalent to

get socket #fd

keepalive

No description available in the introspection data.

constructSocketKeepalive :: IsSocket o => Bool -> IO (GValueConstruct o)

Construct a GValueConstruct with valid value for the “keepalive” property. This is rarely needed directly, but it is used by new.

getSocketKeepalive :: (MonadIO m, IsSocket o) => o -> m Bool

Get the value of the “keepalive” property. When overloading is enabled, this is equivalent to

get socket #keepalive

setSocketKeepalive :: (MonadIO m, IsSocket o) => o -> Bool -> m ()

Set the value of the “keepalive” property. When overloading is enabled, this is equivalent to

set socket [ #keepalive := value ]

listenBacklog

No description available in the introspection data.

constructSocketListenBacklog :: IsSocket o => Int32 -> IO (GValueConstruct o)

Construct a GValueConstruct with valid value for the “listen-backlog” property. This is rarely needed directly, but it is used by new.

getSocketListenBacklog :: (MonadIO m, IsSocket o) => o -> m Int32

Get the value of the “listen-backlog” property. When overloading is enabled, this is equivalent to

get socket #listenBacklog

setSocketListenBacklog :: (MonadIO m, IsSocket o) => o -> Int32 -> m ()

Set the value of the “listen-backlog” property. When overloading is enabled, this is equivalent to

set socket [ #listenBacklog := value ]

localAddress

No description available in the introspection data.

getSocketLocalAddress :: (MonadIO m, IsSocket o) => o -> m (Maybe SocketAddress)

Get the value of the “local-address” property. When overloading is enabled, this is equivalent to

get socket #localAddress

multicastLoopback

Whether outgoing multicast packets loop back to the local host.

Since: 2.32

constructSocketMulticastLoopback :: IsSocket o => Bool -> IO (GValueConstruct o)

Construct a GValueConstruct with valid value for the “multicast-loopback” property. This is rarely needed directly, but it is used by new.

getSocketMulticastLoopback :: (MonadIO m, IsSocket o) => o -> m Bool

Get the value of the “multicast-loopback” property. When overloading is enabled, this is equivalent to

get socket #multicastLoopback

setSocketMulticastLoopback :: (MonadIO m, IsSocket o) => o -> Bool -> m ()

Set the value of the “multicast-loopback” property. When overloading is enabled, this is equivalent to

set socket [ #multicastLoopback := value ]

multicastTtl

Time-to-live out outgoing multicast packets

Since: 2.32

constructSocketMulticastTtl :: IsSocket o => Word32 -> IO (GValueConstruct o)

Construct a GValueConstruct with valid value for the “multicast-ttl” property. This is rarely needed directly, but it is used by new.

getSocketMulticastTtl :: (MonadIO m, IsSocket o) => o -> m Word32

Get the value of the “multicast-ttl” property. When overloading is enabled, this is equivalent to

get socket #multicastTtl

setSocketMulticastTtl :: (MonadIO m, IsSocket o) => o -> Word32 -> m ()

Set the value of the “multicast-ttl” property. When overloading is enabled, this is equivalent to

set socket [ #multicastTtl := value ]

protocol

No description available in the introspection data.

constructSocketProtocol :: IsSocket o => SocketProtocol -> IO (GValueConstruct o)

Construct a GValueConstruct with valid value for the “protocol” property. This is rarely needed directly, but it is used by new.

getSocketProtocol :: (MonadIO m, IsSocket o) => o -> m SocketProtocol

Get the value of the “protocol” property. When overloading is enabled, this is equivalent to

get socket #protocol

remoteAddress

No description available in the introspection data.

getSocketRemoteAddress :: (MonadIO m, IsSocket o) => o -> m (Maybe SocketAddress)

Get the value of the “remote-address” property. When overloading is enabled, this is equivalent to

get socket #remoteAddress

timeout

The timeout in seconds on socket I/O

Since: 2.26

constructSocketTimeout :: IsSocket o => Word32 -> IO (GValueConstruct o)

Construct a GValueConstruct with valid value for the “timeout” property. This is rarely needed directly, but it is used by new.

getSocketTimeout :: (MonadIO m, IsSocket o) => o -> m Word32

Get the value of the “timeout” property. When overloading is enabled, this is equivalent to

get socket #timeout

setSocketTimeout :: (MonadIO m, IsSocket o) => o -> Word32 -> m ()

Set the value of the “timeout” property. When overloading is enabled, this is equivalent to

set socket [ #timeout := value ]

ttl

Time-to-live for outgoing unicast packets

Since: 2.32

constructSocketTtl :: IsSocket o => Word32 -> IO (GValueConstruct o)

Construct a GValueConstruct with valid value for the “ttl” property. This is rarely needed directly, but it is used by new.

getSocketTtl :: (MonadIO m, IsSocket o) => o -> m Word32

Get the value of the “ttl” property. When overloading is enabled, this is equivalent to

get socket #ttl

setSocketTtl :: (MonadIO m, IsSocket o) => o -> Word32 -> m ()

Set the value of the “ttl” property. When overloading is enabled, this is equivalent to

set socket [ #ttl := value ]

type

No description available in the introspection data.

constructSocketType :: IsSocket o => SocketType -> IO (GValueConstruct o)

Construct a GValueConstruct with valid value for the “type” property. This is rarely needed directly, but it is used by new.

getSocketType :: (MonadIO m, IsSocket o) => o -> m SocketType

Get the value of the “type” property. When overloading is enabled, this is equivalent to

get socket #type